亚洲免费性_动漫AV永久无码精品每日更新_亚洲精品视频一二三_国产91亚洲精品_精品久久精品久久_国产精品无圣光一区二区

閥門選型-閥門選定和管道設計時,應注意事項

欄目:技術前沿 發布時間:2019-08-23

閥門選定和管道設計時,應注意事項如下:

  Selection of valves and design of pipes shall comply with the following principals:

  1、根據閥門使用場所、用途且了解有關法規、規格、標準、方針、許用認可后即可選用適合各種要求的閥門;

  In terms of locations and purposes of valves, the suitable valves can be selected after knowing relevant specification, size,

  standards,principal and permission;

  2、確定閥門的工作條件、適用介質、工作壓力、介質溫度

  Need to specify the working condition, applicable medium, working pressure and working temperature of media;

  3、確定與管道相匹配的公稱通徑DN  (mm)

  Need to specify the nominal diameter to match the pipeline: DN(mm)

  4、確定與管道相連接方式法蘭式、內(外)螺紋式、焊接式、對夾式、卡箍式、卡槽式、卡套式等

  Need to specify the connecting type of the pipeline, including flanged type, inside&outside screwed type, welded type, wafer

  type, clip type, groove

  type,and union type etc.;

  5、確定閥門的操作方式:手動、蝸輪動、氣動、電動、液動、電磁動、電液動

  Need to specify the operating type of the valve, including lever, worm gear, pneumatic actuator, hydraulic actuator,

  electromagnetic actuator and electromagnetic-hydraulic actuator etc.;

  6、確定閥門的類型閘閥、截止閥、節流閥、球閥蝶閥、隔膜閥、旋塞閥、止回閥、安全閥、減壓閥、疏水閥、柱塞閥、水力控制閥及其他特種閥

  Need to specify the model of the valve, including gate valve, globe valve, throttle valve, ball valve, butterfly valve, diaphragm

  valve, plug valve, check valve, safety valve, reducing valve, steam trap and plunger valve etc.;

  7、確定閥門的使用形式開關型、調節型、安全型等

  Need to specify the working type of valve, including on-off type, adjusting type, safety type etc.;

  8、確定閥門殼體及內件的材料灰鐵、球鐵、碳鋼、合金鋼、不銹鋼、蒙乃爾合金、銅合金、鋁合金、塑料等

  Need to specify material of body and trim, including grey iron, ductile iron, carbon steel, alloy steel, stainless steel, monel alloy,copper alloy, aluminum alloy, plastic etc.;

  9、確定閥門的密封性能要求、密封等級或密封泄露量

  Need to specify the requirements on

  10、確定閥門的防護涂層要求、包裝要求、運輸要求

  seal performance and grade or leakage;

  Need to specify the requirements on coating, packing and transportation;

  11、特殊需要的閥門還應確定結構長度、閥門高度、外形尺寸、流阻、排放能力、流量特性、防護等級、防爆性能等參數

  Need to specify face to face dimension, height, outline sizes, flow resistance, drainage ability, flow characteristic, protected

  grade, anti-explosive performances etc. for special valves;

  12、確定閥門的安裝位置及姿勢

  Need to specify the installed position and direction for the valve.


主站蜘蛛池模板: 一区二区麻豆 | 国产v亚洲v天堂无码网站 | 欧洲美女7788成人免费视频 | 看了又看第二部免费观看 | 亚洲免费中文字幕 | 天天综合网永久 | 两根黑人粗大噗嗤噗嗤视频 | 国产综合视频一区二区三区免费 | 真实国产乱子伦精品一区二区三区 | 国语自产精品视频在线区 | 精品少妇一区二区三区视频 | 日本三区三区三区二区二区二区高清在线 | 中国一级片在线 | 男女啪啪永久免费观看网站 | 久久久久免费精品国产小说色大师 | 欧美精品一级片 | 久久爱黑人激情av摘花 | 亚洲免费视频播放 | 国产精品永久久久 | 夜晚精品视频在线观看 | 91免费大全| 欧美日韩中文字幕 | 人人av在线| 人妻互换HD无码中文在线 | 国产胸大一区二区三区粉嫩思欲 | 亚洲AV第一成肉网 | 一本久道久久综合婷婷鲸鱼 | xxx久久| 91麻豆精品国产综合久久久久久 | 国产www精品 | 日本一区免费 | 蜜臀av性久久久久蜜臀aⅴ涩爱 | 欧美日韩国产免费一区二区三区 | 97人人爽人人喊人人模波多 | 免费国产一区二区视频 | 欧美日韩欧美 | 性高潮一级片 | 韩国毛片免费观看 | 丝袜美腿在线视频 | 久久久精品国产99久久精品麻追 | 亚洲草视频 |